Sewing-machine.



J. L. KLEINMAN.

SEWING MACHINE.

APPLIOATION rmm 0015,1910.

Patented July 25, 1911.

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WITNESSES:

J. L. KLEINMAN.

SEWING MACHINE.

APPLICATION FILED 0011.5 .1910.

Patented Julj 25,1911.

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INVE/VTQR flwil. flaw/m7? Ag Z WITNESSES ATTORNEYS MLUMIIA PLANOGRAPH00:. WASHINGTON, D. C-

UNITED STATES PATENT ornion.

JACOB L. KLEINMAN, OF NEW YORK, N. Y.

SEWING-MACHINE.

To all whom it may concern:

Be it known that I, JACOB L. KLEINMAN, a subject of the Czar of Russia,and a resident of the city of New York, borough of Manhattan, in thecounty and State of New York, have invented a new and ImprovedSewing-Machine, of which the following is a full, clear, and exactdescription.

The object of the invention is to provide a new and improved sewingmachine arranged to permit the use of a spool of sewing thread insteadof a bobbin, thus saving the rewinding of thread from the spool to thebobbin.

For the purpose mentioned use is made of a thread case adapted tocontain a spool of thread and a loop-taking hook mounted to oscillate onthe peripheral face of the thread case to take hold of the needle threadloop and to carry the said loop sufficiently far around the thread casefor finally casting off the loop to form a lock stitch in conjunctionwith the spool thread.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a side elevation of the sewing machine, parts being insection; Fig. 2 is an end View of the stitch-forming mechanism and thecloth on which the stitches are formed, the cloth being shown insection; Fig. 3 is a like View of the same with the loop-taking hook ina cast-off position; Fig. a is a sectional side elevation of the same onthe line 44 of Fig. 2; Fig. 5 is a side elevation of the same andshowing the loop-taking hook in cast-0E position; Fig. 6 is an invertedplan view of the thread case with the carrier and the loop-taking hookin position; Fig. 7 is a sectional plan view of the same and showing thespool in position in the thread case; Fig. 8 is a perspective view ofthe thread case, the carrier and the loop-taking hook; and Fig. 9 is anenlarged cross section of the cloth showing the stitches formed, theneedle and the tension device on the thread case.

The needle A is mounted to reciprocate in the usual manner on the frameB by suitable mechanism connected with the main shaft G, which latter isalso connected with the usual feed mechanism for the cloth and the usualtake-up mechanism for the needle thread, but as these devices are allwell Specification of Letters Patent.

Application filed October 5, 1910.

Patented July 25, 1911.

Serial No. 585,351.

known parts, it is not deemed necessary to further describe the same indetail.

The needle A operates in conjunction with a loop-taking hook D,pivotally connected with one end of a carrier E, loosely engaged at theother end by a crank arm F secured to one end of a rock shaft Gr,arranged lengthwise and journaled in suitable bearings on the frame B,the other end of the shaft G being provided with a crank arm H pivotallyconnected with the slotted arm of a bell crank lever H fulcrumed on theframe B and connected by a pitman H with a crank arm C arranged on themain shaft C, so that when the latter is rotated a rocking motion isgiven to the shaft G in unison with the up and down movement of theneedle A.

The hook D and the carrier E are mounted to travel on the peripheralface of a thread case 1, made approximately cylindrical and having itsaxis coinciding with the axis of the shaft G, the thread case I beingclosed at the right-hand side by an integral convex wall I having anexternal central recess I into which fits loosely a spherical projectionF formed on the crank arm F in axial alinement with the shaft G, asplainly indicated in Figs. 1, 2, 3, 4. and 5. The other or left handside of the thread case I is open, and across the opening extends aVertical arm J pivoted at J at the top to the thread case I, andengaging with its lower end a recess 13 in the left-hand edge of thethread case I, as indicated in Figs. 6 and 8. The arm J is provided witha recess J 2 loosely engaged by a spherical projection K formed on ahanger K, fulcrumed at its upper end at Y on the frame B, the heel ofthe said hanger K having flat faces pressed on by a spring K attached tothe frame B. The spring K serves to hold the hanger K in either itsnormal vertical position or in horizontal position, that is, when swungupward for removal of the thread case I. The recess J 2 is arrangedeccentrically relative to the recess 1 so that the thread case I isloosely supported on the projections F, K at the same time the threadcase I is held against rotation as will be hereinafter explained.

WVithin the thread case I is arranged a spindle L, on which is looselyheld the spool N carrying the spool thread O, adapted to form with theneedle thread 0 the lock stitch on the cloth P, as hereinafter morefully explained. The spindle L is pivoted at one end at L inside of thethread case I, and the spindle engages at its free end a keeper L fornormally holding the spindle in a horizontal position to rotatably support the spool N. The spool thread 0 after unwinding from the spool Npasses through a slot J formed in the arm J and then passes under atension device Q attached to the outer face of the arm J, as plainlyindicated in Figs. 2, 3, 4t, 5 and 8.

The hook D is formed on a base D having its inner surface curved toconform to the peripheral face of the thread case I, and the said case Dis provided with an inwardly-extending stud D engaging a slot I formedin the peripheral face of the thread case I, the said slot I extendingtransversely and terminating at one end in a diagonal extension Ileading from the right to the left, as plainly indicated in Fig. 6.

The base D of the hook D is provided with an extension D, projectingbeyond the hook D and having in its upper surface an elongated groove Dto accommodate the point of the needle A when the latter moves into itslowermost position to the left-hand side of the hook D, as plainlyindicated in Fig. 4. The carrier E is pivotally connected at E with therear end of the base D of the hook D, and the said carrier E has itsinner surface curved to correspond to the peripheral face of the threadcase I, and the said carrier E is provided with an inwardlyextendingstud E engaging the transverse slot I so that when a rocking motion isgiven to the shaft G then the crank arm F causes the carrier E tooscillate to move the hook D around the peripheral face of the threadcase I, the stud D of the hook D first traveling in the transverseportion of the slot I to finally pass into the oblique terminal I sothat the hook D is swung over from the right to the left into cast-offposition, as indicated in Figs. 3, 5 and 6, and when the crank arm Frocks backward the carrier E and the hook D are returned to normalposition, that is, the hook D again assumes a transverse position afterits stud D passes out of the oblique terminal portion 1 of the slot 1back into the latter. A portion of the thread case I at the lefthandside and adjacent the oblique terminal I of the slot I is beveledinwardly to facilitate the sliding of the loop around the case after theloop is cast off by the hook D. The connection between the crank arm Fand the rear end of the carrier E is by the use of a fork F formed onthe free end of the crank arm F and loosely engaging a pin E formed onthe rear end of the carrier E. The connection between the pin E and thefork F is sufficiently loose to permit the right-hand side of the loopof the needle thread 0 to pass through the said connection at the timethe loop is drawn taut by the action of the take-up of the sewingmachine.

In order to prevent the thread from pass ing between the rear end of thecarrier E and the peripheral face of the thread case I, use is made of arearwardlyextending projection E" formed on the rear end of the carrierE, as plainly indicated in Figs. 2 and 3, which projection extends intothe slot T The eccentric arrangement of the recess J and projection Krelative to the recess T and projection F holds the thread case againstrotating, as the thread case cannot turn on an axis connecting thebearing points owing to the engagement of the stud E and projection E ofthe carrier with the peripheral slot 1 of the thread case. It is alsounderstood that the connection between the thread case I and thesupporting lugs F, K is sufficiently loose to permit the loop thread topass between the said connection at the time the loop is cast off, asindicated in Figs. 3 and 5.

The operation is as follows: hen the several parts are in the positionshown in Fig. 2 then the needle A after having passed through the clothP has moved into a lowermost position to one side of the hook D andsomewhat in front thereof and when the needle A new begins to rise thenthe rock shaft G by the crank arm F and carrier E imparts a forwardmovement to the hook D so that the latter engages the needle thread loopformed on the rising of the needle A, and this loop is carried along bythe hook D around the thread case I during a little more than a halfrevolution of the shaft G, whereby the parts assume the position shownin Figs. 3, 5 and ('5, that is, the hook D is switched or swung over tothe left into an oblique cast-off position, the loop extending on thesides of the thread casing and across the peripheral face thereof and inengagen'ient with the thread 0 passing from the spool N and the tensiondevice Q to the fabric P, as indicated in Fig. 3. The takeup mechanismnow pulls the needle thread 0 taut, thereby forcing the loop past theprojections F, K and the recesses P, J and also through the connectionbetween the pin E and the fork F to complete the stitch at the fabric,as will be readily understood by reference to Fig. 9. After the stitchis formed, the rock shaft G is rocked in an opposite direction to returnthe carrier E and the hook D to the forward starting position indicatedin Fig. 2, and during this time the cloth P is fed rearwardly and theneedle A is caused to descend, after which the above described operationis repeated for forming the next stitch. When the thread 0 of the spoolN has run out, the operator swings the hanger K upwardly to allow ofswinging the arm J upward with a view to permit the operator todisconnect the spindle L from the keeper L and to swing the said spindleoutwardly with the empty spool N for removal of the same from thespindle and replacing it by a new spool filled with sewing thread O. Thespindle L is then returned to its normal position, after which the arm Jand the hanger K are returned and then the thread 0 is passed throughthe recess J 3 and under the tension spring Q, to be in position forforming a loop with the needle thread 0, as above explained.

From the foregoing it will be seen that by the arrangement described nobobbin is required, and the spool filled with thread can be readilyplaced in position in the thread case I to permit of using the thread onthe spool in conjunction with the needle thread for forming a lockstitch, as previously explained: thus winding of the thread from a spoolonto a bobbin and placing the latter in the thread case is entirelydispensed with and the filled spool can be used directly in the machine.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. In a sewing machine, in combination with the needleand its operating mechanism, a thread case adapted to contain a spool ofthread, a looptaking hook mounted to oscillate on the peripheral face ofthe thread case, means connected with the hook for oscillating the same,and means for swinging the hook into and out of cast-off position, saidhook being adapted to take hold of the needle thread loop and to carrythe loop sufficiently far around the thread case for casting off theloop to form in conjunction with the spool thread a lock stitch.

2. In a sewing machine, in combination with the take-up and the needleand its operating mechanism, a cylindrical thread case having interiormeans for supporting a thread spool, supporting means loosely supportingthe thread case at the ends thereof, and a pivoted loop-taking hookmounted to oscillate on the peripheral face of the said thread case andguiding means for said hook to swing the same into and out of cast-oftposition during the oscillation, the said hook being adapted to takehold of the needle thread loop and carry the loop sufficiently fararound the thread case for casting ofi the loop to be drawn up by thesaid take-up to form a stitch in conjunction with the spool thread.

3. In a sewing machine, in combination with the take-up and the needleand its operating mechanism, a cylindrical thread case having interiormeans for supporting a thread spool, supporting means for looselysupporting the thread case at the ends thereof, a tension device at oneend of the said thread case for the passage of the spool thread, aloop-taking hook mounted to oscillate on the peripheral face of the saidthread case, means pivotally connected with the hook for oscillating thesame, and means for swinging the hook into and out of castofi position,the said hook being adapted to take hold of the needle thread loop andcarry the loop sufficiently far around the thread case for casting ofithe loop to be drawn up by the said take-up to form the stitch inconjunction with the spool thread.

4. In a sewing machine, the combination with a take-up, needle andoperating mechanism for the same, a cylindrical thread case having afixed and a movable end, and a peripheral groove having adiagonally-extending terminal, a spool support inside of the thread casefor carrying a thread spool, supports loosely engaging the ends of thethread case, a tension device on the outer end of the thread case forthe passage of the spoolthread, a carrier mounted on the peripheral faceof the thread case and guided in the said groove, a loop-taking hookpivotally connected with one end of the said carrier and guided in thesaid groove, and a crank arm connected with the other end of the saidcarrier.

5. In a sewing machine, the combination with a take-up, needle andoperating mechanism for the same, a cylindrical thread case having afixed and a movable end and a peripheral groove having adiagonallyextending terminal, a spool support inside of the thread casefor carrying a thread spool, supports loosely engaging the ends of thethread case, a tension device on the outer end of the thread case forthe passage of the spool thread, a carrier mounted on the peripheralface of the thread case and guided in the said groove, a loop-takinghook pivotally connected with one end of the said carrier and guided inthe said groove, and a crank arm connected with the other end of thesaid carrier, the connection between the said crank arm and carrierbeing loose for the passage of the loop thread.

6. In a sewing machine, the combination with a take-up, needle andoperating mechanism for the same, a cylindrical thread case having afixed and a movable end and a peripheral groove having adiagonallyextending terminal, a spool support inside of the thread casefor carrying a thread spool, supports loosely engaging the ends of thethread case, a tension device on the outer end of the thread case forthe passage of the spool thread, a carrier mounted on the peripheralface of the thread case and guided in the said groove, a loop-takinghook pivotally connected with one end of the said carrier and guided inthe said groove, the hook having a base extending forwardly beyond thepoint of the hook and the said projecting base having a groove for thepassage of the needle point, and a crank arm connected with the otherend of the said carrier.

7. In a sewing machine, the combination with a take-up, needle andoperating mechanism for the same, a cylindrical thread case having afixed and a movable end and a peripheral groove having adiagonally-extending terminal, a spool support inside of the thread casefor carrying a thread spool, supports loosely engaging the ends of thethread case, a tension device on the outer end of the thread case forthe passage of the spool thread, a carrier mounted on the peripheralface of the thread case and guided in the said groove, a loop-takinghook pivotally connected with one end of the said carrier and guided inthe said groove, a crank arm connected with the other end of the saidcarrier, and a support for the said thread case formed of a projectioncentral on the crank arm and engaging a recess on the inner fixed end ofthe thread case, and a spring-pressed pivoted arm having a projectionengaging a recess on the outer movable end of the said thread case.

8. In a sewing machine, the combination with the needle and itsoperating mechanism, of a thread case adapted to contain a spool ofthread, a loop'taking hook and a carrier for the same mounted tooscillate on the peripheral face of the thread case, the

hook being pivoted to the carrier, and means for swinging the hook.

9. In a sewing machine, the combination with the needle and itsoperating mechanism, of a thread case adapted to contain a spool ofthread, a loop-taking hook mount-- ed to oscillate on the peripheralface of the thread case, means pivotally connected with the hook foroscillating the same, and means for swinging the hook into cast-offposition when moved in one direction and for re turning it to normalposition to take hold of the needle thread loop,'when moved in the otherdirection.

10. In a sewing machine, the combination with the needle and itsoperating mechanism, of a thread case adapted to contain a spool ofthread, the thread case being provided with a peripheral groove having adiagonally extending terminal, a carrier having guided movement on theperipheral face of the thread case, a loop-taking hook pivotallyconnected with one end of the said carrier and guided 'in the saidgroove, and means connected with the other end of the carrier foroscillating the same.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JACOB L. KLEINMAN.

Witnesses:

THEO. Gr. HosTER, PHILIP D. RoLLHAUs.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

